Grinding-mill.



C. E. BELL.

GRINDING MILL.

APPLICATION FILED 00T.12, 1909.

Patented Nov. 28, 1911.

3 SHEETS-SHEBT 1.

ZII

C. E. BELL.

, GRINDING MILL.

APPLICATION FILED oGT. 12, 1909.

Patented NOV. 28, 1911.

3 SHEETS-SHEET 21 U. 1:3. BELL.

GRINDING MILL.

APPLICATION FILED 00T.1z,19o9.

Patented Nov. 28, 1911.

3 SHEETS-SHEET 3.

' the hopper and housing removed; Fig. 3 is enable the stationary bur to be readily ad- UNTTED STATES PATENT OFFICE.

CHARLES E. BELL, 0F HILLSBORO, OHIO, ASSIGNOR TO THE C. S. IELL CO., OF

` HILLSIBORO, OHIO, A CORPORATION OF OHIO.

GRINDINGMILL Specication of Letters Patent.

Patented Nov. 2s, 1911.

To all whom 'it may conc-cm: I

Be it known that l, CHARLES E. BELL, of Hillsboro, in the county of Highland and l State of Ohio, have invented certain new and useful Improvements in Grinding-Mills; and ll hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying` drawings, which form part of this specification.

This invention is an improvement in mills for grinding corn and cobs for feed.

The object of the invention is to produce a mill of this kind which shall be extremely simple in construction, very substantial, durable, and eiicient in operation.

One of the objects of the invention is to justed to perfect alinement with the revolving bur, and easily kept in alinement at all times. It will not be necessary to adjust the bur often, but it is highly desirable and necessary that means be provided for adjusting the stationary bur to compensate for any wear in the bearings of the main shaft, which would affect the axial position of the revolving bur. This and other novel features of the invention will be explained in connection with the drawings; and the invention consists in the novel construction and combination of parts of the mill as illustrated in the drawings and hereinafter described and summarized in the claim.

ln the accompanying drawings-Figure 1 is a side elevation of the complete mill. Fig. 2. is an enlarged plan view of same with an enlarged vertical longitudinal section on line 3 3, of Fig. 2. Fig. 4 is a transverse sectional view on line 4 4, of Fig. 3; Fig. 5 is an end view of the machine with drive pulley removed. Fig. 6 is a detail plan view showing the horizontal adjusting device for stationary bur; and Fig. 7 is a detail sectional view on line 7 7, of Fig. 6.'

The mill comprises a casting or frame 1J which is approximately provided at each end with flattened portions 1n upon which the shaft journal bearings 2, 2, are mounted. and at the sides of portions la, are integral depending pieces 1b to which the upper ends of the legs 3 are attached. These legs are preferably of wood bars. and are secured to the parts 1b of the frame by means of bolts 3a transfixing the parts l", and the upper ends of the legs, washers 3b being placed between the heads of the bolt and the outer sides of the legs as shown. The legs 3 may also be provided at bottom with angle-irons 3c which are bolted thereto, and can also be bolted to the Hoor upon which the mill is placed, so as to hold the mill securely in position.

The bearing 2 is secured to the casting 1 by bolts 2b and the bearing 2a is secured thereto by bolts 2c. The main shaft 4 is journaled in said bearings, and extends through bearing 2 and into bearing 2a. The shaft has an end thrust against a block 2 in bearing 2a; said block being longitudinally adjustable in bearing 2a by means of a screw 2t operable by a hand-piece 2", and screw 2t can be locked when adjusted, by means of a hand-nut 2h. Ball bearings of any suitable construction, indicated at 2*,

may be interposed between the block 2 and the shaft 4 to receive and transmit the end thrust of the shaft 4.

On the shaft 4 adjacent journal 2a is keyed a disk 5 to the face of which is bolted an annular revolving bur 5a; opposite bur 5 and coacting therewith is an annular bur 5", which is bolted to an annular support 5, which is provided at diametrically opposite sides with trunnions 5d that respectively engage holes in plates 5 mounted upon lateral ianges 1K on the sides of frame l. Each plate 5e is rigidly secured in position on flange 1g by-means of a through-bolt 5f. (see Fig. 7 i which engages a slot in the Harige lg so that the plate can be adjusted longitudinally of the shaft 4; this adjustment is regulated by means of an eccentric stop |51 which is fastened by a bolt 5j to the Harige 1E. By loosening bolts 5j and 5f the eccentric 5i can be turned on bolt 5j so as to arrest plate `5" in the exact position to which it should be adjusted. It will be seen that the iixed bur 5b is mounted on the adjustable support 5, and the latter can be adjusted at either side so as to bring the face of the fixed .bur 5b exactly parallel with the face of tlie tween the faces of the fixed and rotating burs. This arrangement provides for a double or universal adjustment of the stationary bur so that at any time the plane of the face of the revolving bur is changed, the plane of the face of the stationary bur may be easily adjusted to suit. One of the trunnions 5d of the support 5c, may be held in a fixed position, as it is only necessary to adjust one side of such support to bring the rotary bur face parallel with that of the revolving bur. This is readily done at trunnion 5d by loosening the bolts and turning the eccentric 15, and then fastening the bolts. The frame casting 1 is also provided with a semi-annular depending portion 1n inclosing the lower portion of the burs, and having a discharge spout 1. The upper portions of the burs are covered by semi-annular housing 1P attached to the lower portion 1l1 by bolts 1q translixing perforated lugs on the frame 1, and housing 1D, as shown.

On the shaft 4 are placed a series of breaker castings 4b which are in the form of rings strung on shaft 4 and provided with projecting teeth 4c adapted to coperate with diagonal ribs 6b in the 'underlying shell 6 attached to the frame 1. The rings 4b are cast with interlocking projections andrecesses as shown at 4f, and the outermost of the rings may be fastened to the shaft by means of through-bolts 45.01. in other suitable manner, sov that all must rotate together. The shaft 4 may be driven by a pulley 4P on its outer end, as shown.

The lower port-ion of the grinding casing is formed of a curved met-al grinding shell 6 which is hinged atone side to the frame 1 as at 6, and' is detachably connected atl its opposite side to the frame 1 by means of lugs 6EL adapted to embrace a corresponding lug 1 on the frame 1'; said lugs when the shell 6 is in closed position being transixed by a wooden break-pin 6b; andv in case any hard substance goes into the mill the pin will break and allow the grinding shell 6 to drop without breaking the working parts.- After such substance is removed the inding shell 6 may be closed and secured 1n position by a new pin.

A hopper 7 is fitted over the breakers 4 and supported on the frame 1 as shown; being fastened to the frame by means of bent rods 7 attached to the hopper at one end and having their, free ends threaded and projecting through eyes 1' on the side of frame 1 and secured by nuts as shown. This enables the hopper to be readily detached when desired.

The degree of fineness to which the material is ground may be regulated by a slide 8 adjustably fitted between the breakers 4 and the stationary bur, as indicated in the drawings; said plate 8 may be secured whenadjusted by means of a thumb-nut 8a on a bolt 8b attached to frame 1 and transfixing a slot in the plate 8.

The materialto be ground, such as corn on the cob, is placed in the hopper, and will be quickly broken into small pieces by the breakers 4c co-acting with the ribs on shell 6; the breaker teeth are so arranged on the shaft that they will feed the crushed matcrial toward the burs; and the necessary degree of ineness of the crushed material before it can pass to the bursis regulable by the plate 8. VThe crushed material passes from the shell to and between the burs, and is reduced by the latter to a meal; the lineness of the meal depending upon the relative adjustment of the burs 5a, 5".

By this mill varieties of feedsv can be ground; and one adjustment of the stationary bur plate enables it to be kept in alinement with the revolving bur at all times. The mills when erected are properly adjusted so that the burs are parallel and they require very little attention thereafter until the journals of the shaft wear.

The feed regulating plate 8 simply cuts off the amount of material that passes from the stationary bur and can be adjusted to vary the amount of product passing to the bui' from the hopper. The teeth on the rings tend to feed the material forward toward the burs; when the mill is running empty. the burs'are kept out of actual contact-by means of a spring washer 4g strung on the shaft between therearmost breaker casting 4b and the rear end of the casing, see Fig. 3. This prevents wearing out of the burs when material is bein ground.

Having descrlbed my invention what I claim as new and desire to secure by Letters Patent thereon is:

. In a grinding mill the combination of a frame, an endwise adjustable rotary shaft journaledl therein, a rotary bur fixedly mounted on said shaft, a bur support adjacent the Arotary bur and provided with trunnions, a bur on said support, plates engaging said trunnions, one of said plates being.

adjustable longitudinally of the shaft, an adjustable eccentric stop engaging the end of said plate, and bolts for fastening the eccentric and plate when adjusted.

In testimony that I claim the foregoing as my own, I aix my signature in presence of two witnesses.

CHARLES BELL.

Witnesses:

E. W. SCHUMACHER, AUGUSTA GARvnY. 

